<section>
  <div class="container">
    <fui-upload
      action="https://jsonplaceholder.typicode.com/posts/"
      fileSize="100"
      fileSizeErrorText="文件大小超出限制"
    >
      <button fuiBtn="primary" fuiBtnOutline>Click to Upload</button>
    </fui-upload>
  </div>
  fileSize: number (限制文件大小，单位：KB；0 表示不限)
</section>

